This is the 364th most frequent Polish word.
grupie
"Grupie" means "to the group" or "in the group" in English.
Here, "grupie" is the locative form of "grupa," indicating the location of the action within a group.
Rozmawialiśmy w grupie o naszych ulubionych filmach.
We talked in the group about our favorite movies.
In this sentence, "grupie" is presented in its dative form to denote the indirect object in the sentence.
Każdemu członkowi grupy wręczono medal za udział.
Each member of the group was given a medal for participation.
Here, "grupie" appears in the locative form once more, indicating the setting in which the celebration is taking place.